Evaporator.



T. SUZUKI. EVAPORATOR.

APPLIOATION FILED 00T. 3, 1 908.

937,1 14. Patented ocu. 19,1909.

-8 SHEETS-SHEET 1.

T. SUZUKI'.

BVAPOBATOB.. 4 APPLICATION FILED 0,0T. 3,'1908.

Patented 0G13. 19, 1909.

a SHEETS-SHEET z.

EVAPOEATOR.` APPLICATION FILED 00T. 3, 1908.

Patented 0ct.19,19o9.

I Z9 Z6 Olli ANDREW. a. GRAHAM co. Pnomumuamvnans. wAsuluGroN. u. cy

roanne-:ao SUZUKI, or solver/ruim.,v JAPAN.

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Specification of Letters Patent.

Patented (lot. 19, 194%?.

Application filed October 3,1908. Serial No. 455,996.

To all whom it may concern:

Be it known thatl, TozABUno SUZUKI, a subject of the'Emperor of Japan, residing at No. 401 Jibeishinden, Sunamura, in the county of Minami-Katsushi-ka, in the Province of Tokyo, Japan, have invented a new and useful Improvement in Evaporators, of which the following is a specification. v

This invention relates to improvements in apparatus for evaporating sugar solutions and is primarily designed for the manufacture of rock candy. l

The invention comprises an evaporating casing provided with laterally disposed instrumentalities for effecting admission and withdrawal of air therefrom, the said instrumentalities being so disposed and arranged that the currents created flow horizontally through the casing.

According to myinvention the liquidto be evaporated is deposited in trays and means are provided for disposing said trays in superposed relation and in the path of the horizontally initiated currents. f

A special feature of the invention consists in providing covered trays so that the contents thereof will not be in contact with the air to which they are subjected.

The invention will be more fully described in connection with the accompanying drawings and will be more particularly pointed out and ascertained'in and by the appended claims.

In the drawings -Figure l, is a side elevation, partly in section, of an evaporating apparatus embodying the main features of my invention. Fig. 2, is a section on line 2-2 of Fig. 3, with parts'in elevation. F ig. 3, is a sectional view on line 3 3 of Fig. 1. Fig. 4, is a plan view of one of the evaporating trays. Fig. 5, is a sectional view'on line 5-5 of Fig. 4.

Like numerals of reference designate similar parts throughout the different figures of the drawings.

An evaporating casing l is shown and the same is preferably cylindrical and is provided with a front wall 2 and a rear wall 3. The top of the casing is providedwith combined lighting and Ventilating doors 1 of any preferred construction. The rear wall 3 is provided with a plurality of closable manholes 4 to permit entrance of the operator to the interior of the casing 1. An air valve 20 and also a supply pipe 21 for the vli quid are provided in the front wall 2. The

foregoing parts are the usual apparatus employed in connection with evaporators and theyl constitute no feature of the present invention and therefore need not be described in detail.

The housing or casing is divided by partitlons 6 and 7 into a central or main evaporating chamber 8 and ingress and egress chamber 9 and 10 and as shown said partitions or diaphragme 6 and 7 are provided with a plurality of apertures. Said apertures are proportioned with respect to the volume of air utilized so that there will be a slight resistance to the lpassage of the air which resistance will cause the same to pass through all of the apertures equally throughout the area of the partitions or diaphragme. By this means the entire volume of air is prevented from passing through the chamber 8 in a straight line, from the point of admission, and is equally distributed in its passage so that air currents will be initiated horizontally through the chamber 8 from planes coincident with the center to planes coinciding with the outermost portions of the diaphragm. Means are provided for effecting admission of air to the ingress chamber 9 substantially throughout the length and height thereof and preferably said means consist of a plurality of horizontally disposed perforated pipes 11 which at their forward ends are connected with a manifold 12 which latter may be connected with a sourceV of supply in any convenient manner as indicated at 5. Means are provided for heating the air discharged from said pipes and preferably said means is disposed in a manner to heat the air prior to its delivery to the main evaporating chamber. As shown said means consists of a plurality of pipes 13 having a connection 14 with a source of supply, disposed in close proximity to and desirably in front of the discharge apertures of the pipes 10 so that the air discharged therefrom rst engages the heating coils and then passes through the diaphragm 6 into the main evaporating chamber 8. The egress chamber 10 is provided with a pipe 15 adapted to be connected with an air pump to cxhaust the air from the chamber 8 and maintain the required low working pressure therein. Said pipe 15 is provided with a perforated extension 16 located in the chamber 10 and extending horizontally therein.

The apertures in the diaphragm 7 are reduced with respect to the volume of air passing therethrough so that the air will pass in equal volumes through all of the apertures thereby maintaining air currents starting from the diaphragm G in the same plane from which they started.

' A plurality of vertical supports 17 and 18 are provided and are arranged in pairs and in a manner to divide the chamber S longitudinally into central and lateral aisles. Horizontal supports 19 and 22 are secured to said vertical supports and are spaced apart from each other vertically. The casing 1 is built upon a skeleton frame of circular angle irons 23 and the inwardly projecting flanges 24 thereof are utilized for anchoring the vertical supports 17 and 1S. rPhe vertical and horizontal supports 17, 1S and 19, 22 respectively are preferably formed of angleiron and the inwardly projecting ianges of the horizontal supports 19 and 22 are utilized for supporting tray or pan holders 25. Means are provided for heating the air in the chamber 8 and preferably said means consists of pipes 26 and 27 disposed between the supports 17 and 18 and connected with a source of supply of steam or the like in any suitable manner. As shown a main supply pipe 2S is connected by a fitting 29 with branch pipes 30, 31, which discharge to manifolds 32, between the vertical supports 19 and 22,' and delivers to a manifold 34 which discharges through pipe 35 to a pipe 36, the latter conveying the steam to any desired' point. r1`he pipe 27 connecting with manifold 33 delivers to a manifold 39 and pipe 37 connected;

with said manifold 39 discharges to pipe 3S.Y The liquid to be evaporated is disposed in trays or pans preferably of the construction shown in Figs. 4 and 5 wherein the receiving portion of pan proper is indicated at 40. Covers 41 are provided for covering said pansand said covers are provided with supporting bars or cleats 42 projecting upwardly therefrom. Byv this arrangement a plurality of pans can be arranged in superposed relation and spaces will be formed therebetween so that the air currents can pass between said pans and engage all of the exterior surfaces thereof.

In operation the operator will enter the casing 1 through one of the manholes 4 and he willY place the tray holders on their supportsat the lowermost and forward part of the'casing 1. The pans will be filled from the supply pipe 21 and as they are illed they will be successively disposed upon the lowermost forward trays in superposed relation. The pan covers will be disposed in a manner to bring thebars or cleats 42 in alinement with the air currents passing laterally through the casing 1 or in other words at right angles to the longitudinal aXis of said casing so that said bars or cleats will not obstruct the passage of air currents between said pans. By this arrangement the bottom and lid portions of each pan will be subjected to the air currents passing through casing 1. After the pans have been filled and placed in position so as to completely till the holders the operator will emerge from the casing and close the manholes. Steam or like heating medium will be admitted to the pipes 14, 2G and 27 and the air pump or other suitable exhausting means will be operated to reduce the internal pressure to the desired point. Fresh air will then be admitted through pipes 11 and will be heated by reason of its engagement with pipes 13 prior to its admission to the central chamber 8. The continued operation of the exhauster will draw the freshly heated air through the central chamber to the egress chamber in the manner hereinbefore described. Evaporation of the liquid will result and the operation will continue until the liquid crystallizes. After crystallization has been effected the steam will be shut off and the air valve 20 will be opened to lower the temperature in the chamber S and the operator will open the manholes and remove the pans containing the crystals.

I claim 1. An evaporator comprising in combination, a casing, divided into ingress, egress and central chambers, means for initiating and maintaining currents of heated or cold air alternately, horizontally through said central chamber in limited volumes from one side to the other, a means for heating and cooling the interior of said casing, a plurality of covered pans containing the solution to be evaporated and arranged in superposed relation in said central chamber and with respect to each other, with intervening air spaces and means for supporting said pans in the path of said horizontall)r flowing currents of air.

2. An evaporator comprising in combination, a casing, provided with perforated diaphragms dividing said casing into egress, ingress and central chambers, means for heating the interior of said casing, means located in said egress chamber for maintaining a relatively low pressure in said casing, means located in said ingress chamber for admitting relatively small quantities of air evenly into all parts of said central chamber, said first and last mentioned means being disposed in a manner to cause the air to pass through said chamber horizontally, a plurality of pans containing the liquid to be evaporated, and means supporting said pans in the path of the horizontally flowing air currents.

3. An evaporator comprising in combination, a casing, provided with laterally disposed vertical perforated diaphragms dividing said casing into a central chamber and ingress and egress chambers, means located passage of the air through all of the perforaA 10 in said egress chamber for maintaining a tions 1n said diaphrag relatively 10W pressure in said casing and In testimony whereof I aliix my signature vvithdawing he air therefrgmfand means in presence of two Witnesses. 1

ooate in sai infrress cham er or su l A ing relatively limited quantities of air tlhlre- TOZABURO SUZUKI' to, the perforations in said diaphragms being Witnesses:

so proportioned as to restrict the passage Iof UHACHI ICHIWARA,

air therethrough thereby effecting` uniform TozABURo MIYAMo'ro. 

